20304432 has 50 divisors (see below), whose sum is σ = 58770668. Its totient is φ = 6767712.

The previous prime is 20304419. The next prime is 20304433. The reversal of 20304432 is 23440302.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20304433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6538 + ... + 9129.

Almost surely, 2^20304432 is an apocalyptic number.

It is an amenable number.

20304432 is an abundant number, since it is smaller than the sum of its proper divisors (38466236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20304432 is a wasteful number, since it uses less digits than its factorization.

20304432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15687 (or 15672 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20304432 is about 4506.0439411972. The cubic root of 20304432 is about 272.8120914367.

Adding to 20304432 its reverse (23440302), we get a palindrome (43744734).

It can be divided in two parts, 20304 and 432, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20304432 in words is "twenty million, three hundred four thousand, four hundred thirty-two".